Flowmaster 817541: 817541 American Thunder Cat-Back Exhaust System 2011-2019 GM Silverado/Sierra 2500HD 6.0L
GM
American Thunder Cat-Back Exhaust System 2011-2018 GM Silverado/Sierra 2500HD 6.0L (Crew Cab/Std Bed 6.5 ft) 4" Tubing 4" Polished SS Tips Dual Out Rear/Dual Out Side Exit 50 Series HD Muffler 409S Stainless Steel